[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [local‑first/Owner](https://evolu.dev/docs/api-reference/common/local-first/Owner) › createOwnerWriteKey

```ts
function createOwnerWriteKey(
  deps: RandomBytesDep,
): Uint8Array<ArrayBufferLike> &
  Brand<"Entropy"> &
  Brand<"Length16"> &
  Brand<"OwnerWriteKey">;
```

Defined in: [packages/common/src/local-first/Owner.ts:128](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/local-first/Owner.ts#L128)

Creates a new random [OwnerWriteKey](https://evolu.dev/docs/api-reference/common/local-first/Owner/variables/OwnerWriteKey) for rotation.

The initial OwnerWriteKey is deterministically derived from
[OwnerSecret](https://evolu.dev/docs/api-reference/common/local-first/Owner/variables/OwnerSecret). Use `createOwnerWriteKey` to rotate (replace) the write
key without changing the owner identity.